package com.zzy;


import java.io.IOException;
import org.apache.commons.lang.StringUtils;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.LongWritable;
import org.apache.hadoop.io.NullWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapreduce.Job;
import org.apache.hadoop.mapreduce.Mapper;
import org.apache.hadoop.mapreduce.Reducer;
import org.apache.hadoop.mapreduce.lib.input.FileInputFormat;
import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat;



/**
 * @author 邹靓仔
 * @date 2020/5/19 -11:08 -flowsum
 **/
public class FlowSortMapReduce {

    public static class FlowSortMapper extends Mapper<LongWritable,Text,FlowBean,NullWritable> {
        @Override
        protected void map(LongWritable key, Text value,Context context)
                throws IOException, InterruptedException {
            String line = value.toString();
            String[] fields = StringUtils.split(line, " ");
            String phoneNumber = fields[0];
            long up_flow = Long.parseLong(fields[1]);
            long down_flow = Long.parseLong(fields[2]);

            context.write(new FlowBean(phoneNumber, up_flow, down_flow), NullWritable.get());


        }


    }
    public static class FlowSortReducer extends Reducer<FlowBean, NullWritable, Text, FlowBean> {
        @Override
        protected void reduce(FlowBean key, Iterable<NullWritable> values,Context context)throws IOException, InterruptedException {
            String phoneNumber = key.getPhoneNumber();
            context.write(new Text(phoneNumber), key);

        }
    }

    public static void main(String[] args) throws ClassNotFoundException, IOException, InterruptedException {
        Configuration conf = new Configuration();
        Job job = Job.getInstance(conf);
        job.setJarByClass(FlowSortMapReduce.class);
        job.setMapperClass(FlowSortMapper.class);
        job.setReducerClass(FlowSortReducer.class);
        job.setMapOutputKeyClass(FlowBean.class);
        job.setMapOutputValueClass(NullWritable.class);
        job.setOutputKeyClass(Text.class);
        job.setOutputValueClass(FlowBean.class);
        FileInputFormat.setInputPaths(job, new Path(args[0]));
        FileOutputFormat.setOutputPath(job, new Path(args[1]));

        System.exit(job.waitForCompletion(true) ? 0 : 1);
    }
}
